The LVDS signals go through a Cross Bar Switch (CBS), which allows input/output routing within each group of eight LVDS signals. Each CBS port can be individually software-configured for routing, termination, and direction.

Each of the single-ended port can be configured as input or output. The RS-485/422 configuration can be selected as full-duplex RS-422 (independent RX/TX pairs with RX termination) or half-duplex RS-485(RX/TX pairs tied together, no termination on board) based on the ordering option. The FMC155 can provide power of up to 12 W to an external module.